Freitag, 10. August 2012

The type or namespace name ‘LayoutsPageBase’ does not exist


After creating an empty SharePoint 2010 solution in Visual Studio 2010 I added an Application Page to the project but compiling failed and gave me the following error:

The type or namespace name 'LayoutsPageBase' does not exist in the namespace 'Microsoft.SharePoint.WebControls' (are you missing an assembly reference?)

The reason for this was quite simple when I created the SharePoint Project I had chosen to deploy it as a Sandbox Solution and application pages are not supported in sandboxed solutions. Selecting the project properties and changing the Sandboxed Solution property to False and it compiled successfully.
 
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